pierce



(No Model.)

A. J. PIERCE.

GOVERNOR.

2 Sheets-Sheet 1.

Patented May 8 1894.

IHL

iliiii NNNNNNNNNNNNNNN GRAPHING COMPANY.

(No Model.) w 2 Sheets-Sheet 2. A. J. PIERCE. GOVERNOR. No-. 51 PapeptedMay 8, 18 4.1

Q91. QG W m.-

UNITED STATE PATENT OFFICE.

ANDREWV J. PIERCE, OF RAOINE, WISCONSIN, ASSIGNOR TO THE PIERCE ENGINECOMPANY, OF SAME PLACE.

, GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 519,412, dated May 8,1894.

Application filed June'ie, 1893. Serial 110,478,098. made.) 7.

To all whom it may concern:

l 3e it known that I, ANDREW J. PIERCE, a citizen of the United States,and a resident of Racine, 1n thecounty of Racine, and in the State ofWisconsin, have invented certain new and useful Improvements inGovernors; and I do hereby declare that the following is a full, clear,and exact description thereof.

My nvention relates to governors especlally designed for use inconnection with gas engines, and to that end consists in certainpeculiarities of construction and combinat1on of parts as will behereinafter fully set forth and subsequently claimed.

In the drawings Figure 1 is a plan view of my improved device applied toa gas-engine, partially broken away or in section to better illustratedetails of construction. Fig. 2 is a longitudinal vertical section onthe line22 of Fig. 1.

Only so much of the engine is shown as is necessary to illustrate mypresent invention.

A designates part of the engine frame, B is the cylinder. 3

O is the piston-rod.

D D is the crank.

E E is the crank-shaft supported in suit able bearings a a on the frameA.

F is a cam-wheel, secured by a key f, or otherwise, to the crank-shaftE, so as to be fast with it. p r

G is a grooved sleeve, secured to the shaft E by means of aspline g, andhaving two circumferential grooves b, c.

H is the governor collar, secured to the shaft E, having arms h h towhich are pivoted the shanks of the governor balls I I, the inner endsof said shanks terminating in knobs t t fitting within the groove 0 ofthe sleeve G, there being springs 11' 1 connecting the balls I I withthe collar H to normally keep the sleeve G in toward the cam-wheel F.

J is abracket projecting from the frame A, terminating in an arm K,which arm projects transversely to the line of the engine,'and back ofthis arm said bracket is provided with a recess 7', covered. by a cap Jsecured to the said bracket, as by bolts j j. This recess 7 is parallelto the length of the engine, and line of the piston-rod C, and is fittedwith a slide L, formed with two heads L and M. The head L is providedwith a forward the free end of the finger N. On the describedbracket-arm K there is pivoted a bent lever O, at about the center ofsaid lever, as shown at k, the inner arm of this lever terminating in aknob 0, fitting within the described groove '1) of the sleeve G whilethe outer arm of said lever carries a wheel 0 which bears against thefinger N on the side opposite the spring n. A lug J projects fromtheunder side of the bracket J and a similar lug L projects from the underside of the slide L, the said lugs being connected by a spring I.

Q, is a stud projecting from the side of the frame A, on which studthere is pivoted the lower end of an arm Q, the upper end of this armcarrying atapered lug q, the end of whichisflat,and whichnormallybearsagainst the point of the finger N.

p R is a valve-rod, one end of which is forked to straddle the upper endof the arm Q to which it is pivoted, as shown at r, the other end ofsaid rod carrying a valve R. for engagement with the valve-seat .9within a valve casing S. I

T is a coiled spring surrounding the valverod R between the sleeved endS of said valve-casing and a collar, 25, upon the rod. This valve-casinghas two chambers S S a gas-supply pipe S leading intothe chamber S and apassage S leading from the chamber S intothecylinder B.

B is the cylinder head containingthe igniting chamber and suitable gaspassages and igniting devices, not shown.

. The operation of my invention will be readily understood from theforegoing description of its construction, taken in connection with theaccompanying drawings. When the parts arein their normal positions,illustrated in the said drawings, with every revolution of thecrank-shaft E, the large part of the cam-wheel F bearing against thewheel L on the slide L will force said slide forward, and the finger Ncarried by said slide wlll press against the tapered lug q of the arm Qand thereby force the valve-rod R forward, also, thus pushing the valveR. from its seat and opening the passage way in the valve casing S,thereby admitting gas from the pipe S into the interior of the cylinderB. As the shaft E and cam-wheel F complete a half revolution, the smallpart of said cam-wheel is in contact With the wheel L on slideL and thespring P instantly retracts said slide, the spring T, at the same time,retracting the rod R, and closing the valve opening 8 by the valve R,this operation of opening and closing the passage in the valve-casing S,and the consequent periodic admission of gas to the cylinder beingrepeated with each revolution of the said crank-shaft so long as thesaid parts remain in the original normal positions illustrated. Should,however, the rate of speed of said revolutions increase, then it is notdesirable to have the gas supplied to the cylinder more rapidly thanbefore, and the proper admission of gas is regulated by the describedgovernor device. As the speed increases, the ballsI I fly away from theshaft against the force of the springs h h and the knobs t t on theinner ends of the shanks of said balls, being in the groove 0 of thesleeve G, will draw said sleeve away from the camwheel F, andsimultaneously, by reason of the knob o of the centrally-pivoted lever 0being in the groove 6 of said sleeve, this will draw said knob 0outward, and consequently force the other end of the lever O inward, the

wheel 0' on said end of the lever pressing against the finger N, andcarrying its point beyond the end of the tapered lug q, so that, as thelarge part of the cam-wheel F by its contact with the slide wheel Lforces the slide L forward, the said finger N will slip along thetapered inner side of the lug q, and consequently the valve-rod R willnot be moved, at this time, and the valve R will remain in the closedposition. As the speed relaxes, the governor balls I I will retract,aided by the springs 71. 77., thereby forcing the slide G back to theposition shown in the drawings, and the first described operation of thecam-wheel, slide and valve-rod will recommence.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an engine, the combination with a suitable frame, and avalve-casing, valve and valve-rod supported thereon, and an arm pivotedto said frame and to said valve-rod, and carrying a tapered lug, of arevolving shaft, a cam-wheel fast thereon and a grooved sleeve splinedthereon, a governor on said shaft connected to said grooved sleeve, aslide carrying a wheel in engagement with said camwheel and providedwith a pivoted finger normally in engagement with the said tapered lug,and a pivoted lever in engagement with said grooved wheel and saidfinger, substantially as set forth.

2. In an engine, the combination with a suitable frame, and avalve-casing, valve and valve-rod supported thereon, of a revolvingshaft, a cam-wheel fast thereon and a grooved sleeve splined thereon, agovernor on said shaft, the shanks of the governor balls fitting in oneof the grooves of said sleeve, a bracket projecting from said frame, andprovided with a recess, a slide movable in said recess and carrying awheel at one end in line with said cam-wheel, and a pivoted finger atits other end, an arm pivoted to the frame and to the valve-rod, andcarrying a tapered lug normally in line with the said finger, and alever pivoted to said bracket, and having two arms, one in engagementwith the described grooved sleeve, and the other bearing against thesaid finger, substantially as set forth.

3. In an engine, the combination with a suitable frame, and avalve-casing, valve and valve-rod supported thereon, and an arm pivotedto said frame, and to said valve-rod and carrying a tapered lug, of arevolving shaft, a cam-wheel fast thereon and a double grooved sleevesplined thereon, a governor on said shaft comprising a collar with arms,balls having shanks pivoted to said arms and terminating in knobsfitting in one of the grooves of said sleeve, and retracting springsconnecting said collar and balls, a bracket on the frame provided with arecess, and a depending lug, a slide in said recess, provided with ahead at each end and a depending lug, a spring connecting the saiddepending lugs, a wheel on one of the slide-heads, and a springcontrolled pivoted finger on the other head,

a lever pivoted about midway on the said bracket and carrying a knob atone end fitting within the other groove of the said sleeve, and a wheelatits other end impinging against the said finger, and aretractingspring on the said valve-rod, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atRacine, in the county of Racine and State of VVisconsimin the presenceof two witnesses.

ANDREI/V J. PI ERGE.

Witnesses:

JoHN W. OWEN, MABEL DAVEY.

